Electric lamp.



H. CSANYI.

ELECTRIC LAMP.

APPLIOATION FILED MAY 14, 1913.

Patented June 30, 1914,

STATES rarer @FFICEZ.

HENRY CSANYI. OF NEW YORK. N. Y.. ASSIGNOR TO MAXIVOLT PRIMARY BATTERY CO., OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

ELECTRIC LAMB.

t. i tl'ititm.

Specification of Lette s P te t. Patented June 30. 191 4.

Application filed May 14, 1913. Serial No. 767,694.

exposed to an open light, a spark, or a glowing filament of'high temperature.

The object of this invention is to providea sate incandescent electric lamp preterably of a portabletype to he worn on the cap or other convenient place, or carried in the hand and operated by a low voltage current generated by a small battery of light weigl'it supported from a strap around the waist of the llstl or in any other desirable manner. The lamp is made sal'e by means of an automatic switch or cir uit interrupter connected to the lead in wires from the battery, that is automatically closed'by the lamps when screwed into its socket, and continues closed so long as the hull) remains perfect. but theinoment said bulb is broken, whatever the cause, the circuit interrupter or switch opens and cuts out the circuit through the filament, extin guishing the light.

A permissible or Sitftfllitllll) for use in mines, particularly coal mines where explosive. mixtures of gas and air are very common, should possess means for opening the circuit through the tilament instantly upon breaking the bulb as from av blow on any part of the lamp or its mounting; l'urthertore the safety devices should he so simple in construction. positive in action and pro- I tected from injury or interference in such manner as to insure perfect operative conditions at all tunes and'undc all known conditions. To comply with the conditions called for the lamp. hereinafter described in clude in the illuminating circuit means for normally holding said circuit open, said means to be actuated by the lamp when fully inserted in its socket to close the circuit and maintain it closed until the bulb of the lamp is broken whereupon said means will automatically open the illuminating circuit and cause the extingnishment of the light. One way of accomplishing the object desired which is the best now known to me. is illustrated in the accompanying drawings. in wlneh- Figure 1 is a central sectional view of a lamp socket and its shade or reflector with anincaralescent lamp in position and one form of circuit interrupter in use therein. Fig. 2 is :1 similar view showing the lamp hulb broken and the circuit interrupter open. Fig. 3 is a front view of the lamp.

lnthe drawing. 10 indicates an incandescent lamp socket as a whole-coinprising an outer tubular sleeve 11 of metal fitting tightly around a. rap shaped member 1'2 made ol' non-comhn-ting material within which a screw thrcznlcd metal lamp holder 13 cemented or otherwise secured. the sleeve ll and holder 13 heing thus insulated from each other. An incamlesccnt himp ll is screwed in the holder. one terminal of its lilament making conta t at 1:3 with a screw 0!" bolt it) pas ing .hrongh the mcmher 1;. while the other terminal is soldered at ii; to the. threaded metal collar la by means ol whi h the lamp is connected to the holder lil.

Projecting l'orwardly from the slecre ll and over the lamp It is a sheet metal shade and rcllector lf closed in limit by a trans parent shield. here shown in the form of a lens 2t). Soldercd or riveted n one side of the shade. and retlector 19 and within the same is a contact linger ."r projecting torwardly beyond the hull) of the lamp H. A second linger 22 p eferably resilient, extends from the lamp holder 13 between the lamp and the linger 21 to, and preferably in contact with the lens 20. The contact. lingers 21, 22, which constitute the circuit interrupter, are insulated from each other at their point ot support and are in contact only when the lamp 1 1: is in its socket 10. At othertimes the resiliency of one, or if desired both fingers'keeps them apart. The lighting current enters the lamp from the screw 16, thence through the filament, to the collar 18! From the collar the current passes to the lamp holder 13, interrupter 21,

22, shade l9, sleeve 11, thence back to source. The current wires are indicated by dotted lines 23 and 24. The manner of electrically connectingthese wires to the bolt 16 and sleeve 11 may be made in numerous ways, but as this connection forms no part of the present invention, the wires are merely indicated by dotted lines.

WVhen-there is no lamp 14 in the holder 13, the contact fingers will be separatedas in Fig. 2, but on screwing alamp into its holder, the bulb of the lamp will press upon the finger 22 and force it into contact with finger 21 so that as soon as the contact 15 engages the screw it? the filament will become incandescent and continue to glow until the lamp is removed or broken. An unusual shock or jar, such as would result from a fall of the entire lamp, or a. blow from a flying piece of coal. or other hard object, sutiicient to break the bulb wougd permit the fingers to separate and po itiyely open the circuit, instantly extinguishing'the light before communicating to any explosive gas should such be present in the mine By extendin the finger 22 to the lens 20, a blow of S11 cient force to break the lens or deform the reflector would press said finger against the bulb and break it, thus permitting the fin gels to separate and break the'circuit as a matter of precaution.

It, is to be noted that the contact fingers forming the intcrrupte' are both contained within the shade or reflector 19 on one side of the lamp and its socket in position to be readily and positively closed upon placing the lamp in its holder; The fingers are convenicut ol? access both to clean and adjust, yet out of the way of careless handling and protected from external injury.

As previously stated, the detail structure llcreinaliove described illustrates one form only which this invention may take. it is however to he distinctly understood that the invention co'vers to the. fullest extent, the features set forth in the accompanying claims.

What I claim ist-- 1.11: an incandescent electric lamp in combination, a socket containing contacts for closing the circuit through the lamp a supplemental circuit closer or interrupter Forming a part of the lamp circuit coinprising two members connected with said socket tending to separate from each other, oneot said members being arranged to be pressed upon. by the lamp when in said socket to autonnitically close and hold closed said interrulitor and permit the same to open and break the circuit when the lamp bulb is broken.

2. The combination with an incandescent electric lamp, its socket, and a circuit closer therein, of a supplementary circuit interrupter mounted on the lamp socket and included in the lamp circuit, said interrupter being automatically closed and held closed by the bulb ot the lamp pressing thereon and. automatically opened to cut out said lainp when the bulb is broken.

3. The combination with an incandescent electric lamp, oi a circuit interrupter included in the lamp circuitcomprising two resilient fingers tending to s ringapart but automaticaltv closed and he d closed by the bulb ot' the lamp pressing thereon, and opening automatically to cut out said lamp when the bulb is broken. 5

t. The combination with an incandescent electric lamp and, its socket, of a shade oi reflector connected to said socket and included in the lighting circuit, a lamp holder in the socket? and insulated from the shade or reflector, a circuit interrupter forming a part of the lighting circuit comprising fingers tending to separate, one of said fingers being in circuit with said shade or reflector and the other connected to the lamp holder, said lingers being in contact; only when a lamp is in position in its holder.

The combination with an incandescent electric lamp and its socket, of a shade or reflector for said lamp included in the lighting circuit, a transparent shield for the shade or retlector, a circuit interrupter forming a part of said lighting circuit comprising two lingers tending to separate, one ol said lingers being attached to the shade or reflector. and the other to the lamp socket and extending forwardly beyond the lamp to said shield, said fingers being held in contact by the lamp bulb pressing thereon.

(i. The combination with an incamlescent electric lamp and its circuit closure, of a supplementary circuit interrupter included in the lamp circuit comprising two contacts tending to separate, one of said'contacts being, resilient and held against the other by the bulb of the lamp pressing thereon, a

nesses.

HENRY CSANYI. Witnesses: U

1*. H. Broxnn'ron, J. GRANVILLE MEYERS. 

